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#21287 - 01/30/03 04:59 PM How To Remove Water From Buried Conduit?
Shortdogg Offline
Junior Member
Registered: 01/30/03
Posts: 1
Loc: Southern Ca
Is there a way to remove water from buried conduit? I'm running some cat5 and RG6 to a detached garage. While I was pulling the cable I noticed they were wet as I pulled them thru the conduit. There was a rainstorm and water must have entered the conduit while the ends were exposed. Any ideas or is it ok to leave the water in the conduit? It is a 200' run and is 2" diameter NM conduit. Thanks
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#21288 - 01/30/03 05:08 PM Re: How To Remove Water From Buried Conduit?
golf junkie Offline
Registered: 04/22/01
Posts: 507
Loc: York, NE
Blow a pull string thru the pipe. The piston will push most of the water out....make sure you stay clear of the downstream conduit opening or you will get a shower.

If you want the pipe completely dry you can tie a rag onto the pull sting and pull it through the pipe a few times to get the remaining water out.

#21289 - 01/30/03 05:18 PM Re: How To Remove Water From Buried Conduit?
txsparky Offline
Registered: 05/25/01
Posts: 552
Loc: Magnolia,.Texas U.S.A.
The pipe will eventually fill up with water again from condensation.I don't know of any way to avoid it.
#21290 - 01/30/03 05:53 PM Re: How To Remove Water From Buried Conduit?
Bjarney Offline
Registered: 04/10/02
Posts: 2527
Loc: West-Southern Inner-Northeast ...
I'll side with tx here. For outdoor ducts, use gel-filled cat. 5 UTP and gel-filled RG6 cable, or signals will deteriorate after awhile. Short of a continuous purge of dried air or dry nitrogen, you'll never keep cables dry in underground ducts. Rest assured outside plant installation and maintenance folks wouldn’t go to all the trouble if it wasn’t needed or there was an economical alternative.
#21291 - 01/30/03 05:55 PM Re: How To Remove Water From Buried Conduit?
resqcapt19 Offline
Registered: 11/10/00
Posts: 2148
Loc: IL
As txsparky said, you can't keep underground conduit dry. Standard Cat-5 cable will not perform well when wet. You should consider a Cat-5 rated for wet locations. It is "gel" filled like underground phone wire.
#21292 - 01/30/03 05:56 PM Re: How To Remove Water From Buried Conduit?
Electric Eagle Offline
Registered: 04/20/02
Posts: 914
Loc: Alpharetta, GA
txsparky is right. Any underground concuit will get moisture in it and it's almost imposible to avoid. If you can remove ALL the current moisture and humidity then seal the ends of the pipe, it should remain dry, but I think this is impossible. All underground conduit is considered a wet location, so make sure the wire is rated for wet conditions.

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